A cold plasma accessory having a hand piece having within in it flexible tubing, wiring, a PCB board connected to the wiring, and a conductive connector tube electrically connected to the PCB board, the conductive connector tube having an inner channel, a rigid tube extending from the distal end of the hand piece, and an electrode within the rigid tube. The electrode comprises a conductive connector having a contact surface contacting the conductive connector tube, a distal end surface facing away from the conductive connector tube, and a channel extending through a center of the conductive connector, the channel being fluidly connected to the flexible tubing, the distal end surface of the conductive connector being outside of the channel in the conductive connector, and a conductive wire connected to the distal end surface of the conductive connector.
